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slag

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slag

In chemistry, the molten mass of impurities that is produced in the smelting or refining of metals.

The slag produced in the manufacture of iron in a blast furnace floats on the surface above the molten iron. It contains mostly silicates, phosphates, and sulphates of calcium. When cooled, the solid is broken up and used as a core material in the foundations of roads and buildings.



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? Mentioned in ? References in classic literature
 
Great heaps of slag and dumps of cinders loomed up on each side, with the high shafts of the collieries towering above them.
The Valley of Fear by Doyle, Sir Arthur Conan View in context
The very furniture in the room seemed to have shrunk since she saw it before: the slag in the tapestry looked more like a ghost in his ghostly blue-green world; the volumes of polite literature in the bookcase looked more like immovable imitations of books.
Middlemarch by Eliot, George View in context
This is a gentleman,--and proffers civilities without end; but all the rest are slag and refuse.
Essays, First Series by Emerson, Ralph Waldo View in context
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